Dynamic Electrical Characteristics of Calf Muscles Under Pressure Based on Electrical Impedance Tomography
10.19756/j.issn.0253-3820.251056
- VernacularTitle:基于电阻抗层析成像的压力下小腿肌肉动态电学特性分析
- Author:
Bo SUN
1
;
Cai-Fei HOU
;
Yun-Qian WANG
;
Tong ZHAO
;
Xiang-Peng WANG
;
Yi-Ji WANG
;
Jia-Feng YAO
Author Information
1. 西安理工大学机械与精密仪器工程学院,西安 710048;千叶大学工学部机械工学科,日本千叶263-0022
- Keywords:
Electrical impedance tomography;
Compartment pressure;
Extracellular fluid volume;
Extracellular ion concentration;
Well leg compartment syndrome
- From:
Chinese Journal of Analytical Chemistry
2025;53(6):1028-1036,后插1-后插3
- CountryChina
- Language:Chinese
-
Abstract:
This study aimed to address the limitations of current diagnostic methods for well leg compartment syndrome(WLCS),including invasiveness,high costs,and insufficient accuracy,by proposing a solution based on electrical impedance tomography(EIT)technology.The electrical response characteristics of the human calf muscle to changes in compartment pressure using EIT were investigated,aiming to visualize the effects of pressure variations on the electrical properties within the compartment and to provide technical support for early non-invasive detection of WLCS.EIT sensors were placed on the right calf of the experimental subjects,with pressure applied externally to the right thigh.Measurements were conducted in two phases:pre-pressure(pre)and post-pressure(post).Pre-pressure,the conductivity distribution image σpre was measured when the calf was placed horizontally.Post-pressure,the calf was raised at an angle of approximately 30°,and pressures of 0,40,80,and 120 mmHg were applied to the right thigh,and the corresponding conductivity distribution images σP=0,σP=40,σP=80,andσP=120were recorded.To quantitatively analyze the pressure effects on the compartment response,paired sample t-test was used to assess the spatial-mean conductivity((σ))from the EIT reconstructed images.Compared to the horizontal position of the right calf,raising the calf at approximately 30° resulted in a significant increase in the spatial-mean conductivity(σ)of the M1 compartment.Furthermore,when pressure was applied to the right thigh while the calf remained at a 30° angle,the spatial-mean conductivity of the M1 compartment σM1 showed an increasing trend with rising pressure.The results indicated that as compartment pressure increased,the volume of extracellular fluid and ion concentration significantly increased,leading to an increase in conductivity,which reflected ischemia and hypoxia in muscle tissue and the related pathophysiological changes.EIT,due to its high sensitivity to conductivity changes,offered a potential effective diagnostic method for non-invasively monitoring the onset and progression of muscle compartment syndrome.
